RE: Suggestions solicited - Change Column Datatype from Number to

From: DENNIS WILLIAMS <DWILLIAMS_at_LIFETOUCH.COM>
Date: Thu, 24 Oct 2002 14:04:46 -0800
Message-ID: <F001.004F32EC.20021024140446@fatcity.com>

Yeah, well the developers are always pi$$ed about something anyway. ;-)

Seriously, good point, I've been spoiled, because most of my applications have kept the RI in the application as was being discussed earlier. Now they are switching to Java and in future projects will be implementing RI in Oracle, so I'll have to be more careful about that.

Dennis Williams
DBA, 40%OCP
Lifetouch, Inc.
dwilliams_at_lifetouch.com

-----Original Message-----
Sent: Thursday, October 24, 2002 4:18 PM To: Multiple recipients of list ORACLE-L to

Dennis,

That's a good thought, and it works if you don't have grants, constraints or dependencies on the original table.

If you drop table1, you lose them all

Rachel

• DENNIS WILLIAMS <DWILLIAMS_at_LIFETOUCH.COM> wrote:
  > Deepak, If there are many columns on these tables, your method may be
  > best.
  > However, this will generate a lot of redo. You can usually accomplish
  > this
  > with a CTAS nologging, which won't generate redo. If you really don't
  > want
  > to change the location, you can:
  > create table temp as select * from table1 nologging
  > drop table table1
  > create table table1 (column, column . . . ) as select * from temp
  > nologging
  > drop table temp
  >
  >
  >
  >
  > Dennis Williams
  > DBA, 40%OCP
  > Lifetouch, Inc.
  > dwilliams_at_lifetouch.com
  >
  > -----Original Message-----
  > Sent: Thursday, October 24, 2002 3:15 PM
  > To: Multiple recipients of list ORACLE-L
  >
  >
  > We have a need to change the datatype of several columns in a table
  > from
  > number to varchar2. Most of the rows have data in these columns hence
  > a
  > direct 'alter table ...' will not work.
  >
  > We plan to create a temp table, move the data from these colums to
  > that
  > table, modify the column datatype from number to varchar2 and then
  > update
  > the colums with the data that was moved to the temp table.
  >
  > Any suggestions/comments or a better way to do this ? Oh, and we are
  > on
  > 8.1.7.1
  >
  > thanx
  > deepak
  >
  >
  > --
  > Please see the official ORACLE-L FAQ: http://www.orafaq.com
  > --
  > Author: DENNIS WILLIAMS
  > INET: DWILLIAMS_at_LIFETOUCH.COM
  >
  > Fat City Network Services -- 858-538-5051 http://www.fatcity.com
  > San Diego, California -- Mailing list and web hosting services
  > ---------------------------------------------------------------------
  > To REMOVE yourself from this mailing list, send an E-Mail message
  > to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in
  > the message BODY, include a line containing: UNSUB ORACLE-L
  > (or the name of mailing list you want to be removed from). You may
  > also send the HELP command for other information (like subscribing).
  

  ---

Do you Yahoo!?
Y! Web Hosting - Let the expert host your web site http://webhosting.yahoo.com/

-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.com
-- 
Author: Rachel Carmichael
  INET: wisernet100_at_yahoo.com

Fat City Network Services    -- 858-538-5051 http://www.fatcity.com
San Diego, California        -- Mailing list and web hosting services
---------------------------------------------------------------------
To REMOVE yourself from this mailing list, send an E-Mail message
to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in
the message BODY, include a line containing: UNSUB ORACLE-L
(or the name of mailing list you want to be removed from).  You may
also send the HELP command for other information (like subscribing).
-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.com
-- 
Author: DENNIS WILLIAMS
  INET: DWILLIAMS_at_LIFETOUCH.COM

Fat City Network Services    -- 858-538-5051 http://www.fatcity.com
San Diego, California        -- Mailing list and web hosting services
---------------------------------------------------------------------
To REMOVE yourself from this mailing list, send an E-Mail message
to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in
the message BODY, include a line containing: UNSUB ORACLE-L
(or the name of mailing list you want to be removed from).  You may
also send the HELP command for other information (like subscribing).

Received on Thu Oct 24 2002 - 17:04:46 CDT